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Now the upgrade is finished. Typical Errors: 1. Invalid Port Number: in Device Manager, make sure you have the correct COM port number for “Prolific USB-to-Serial Com Port.” 2. Wrong “.bin” file: make sure you have the correct “.bin” file for firmware upgrade. 3. Wrong downloader, you should use iOptron Downloader instead of the Flash Downloader. 4. Use PL-2303 driver provided by iOptron. The newest version from Prolific may not work properly for iOptron’s hand controller. 46
